Drug interactions may take place if CBD is taken at the same time as another course or dose of medication. CBD can affect how our bodies process other drugs, which may impact how much of the medication ends up in our system as well as alter its reaction in the body, potentially causing negative side effects. Pictures of Tegretol (Carbamazepine), drug imprint information, side effects for the patient. History. The effect of grapefruit juice with regard to drug absorption was originally discovered in 1989. The first published clinical report on grapefruit drug interactions was in 1991 in The Lancet entitled Interactions of Citrus Juices with Felodipine and Nifedipine. Learn about Tegretol (Carbamazepine) may treat, uses, dosage, side effects, drug interactions, warnings, patient labeling, reviews, and related medications. Establishes the medication carbamazepine (Tegretol, Tegretol XR , Equetro, Carbatrol, Epitol, Teril), a drug used in the treatment of simple and complex partial seizures and in generalized seizures of the grand mal type. Find patient medical information for Tegretol Oral on WebMD including its uses, side effects and safety, interactions, pictures, warnings and user ratings. Warning Unsafe blood cell count problems have happened with Tegretol (carbamazepine tablets). This includes a type of anemia called aplastic anemia and a type of low white blood cell count. Emergency Preparedness. Bioterrorism, drug preparedness and natural disaster response. Drug Approvals and Databases. CDER highlights key Web sites. Tegretol (carbamazepine) is used to treat seizures, nerve pain and bipolar disorder. Includes Tegretol side effects, interactions and indications. Tegretol (Carbamazepine) is used for treating certain types of seizures (partial, tonic-clonic, mixed), nerve pain (such as trigeminal neuralgia and diabetic neuropathy), and bipolar disorder.